<!doctype html>
<html class="no-js" lang="zh">
<head>
    <meta charset="utf-8">
<html>
<body>

<form action="http://114.215.81.196/tt2018/public/index.php//user/avatar" method="post"
      enctype="multipart/form-data">
    <label for="file">Filename:</label>
    文件：<input type="file" name="avatar"  ><br />
    user_id：<input type="text" name="user_id" value="3" /><br />
    sid：<input type="text" name="sid" value="112233445544332211" /><br />
    <br />
    <input type="submit" name="submit" value="Submit" />
</form>

</body>
</html>